分布式数据库学习Note132：OceanBase社区版中，如何查看数据备份结果？

数据备份执行完成后，您可以通过视图查看备份任务历史。

通过视图查看数据备份任务历史

1. 使用 root 用户登录到数据库的 sys 租户。

2. 查看数据备份历史。

   示例如下：

   obclient> SELECT * FROM oceanbase.CDB_OB_BACKUP_JOB_HISTORY\G
   *************************** 1. row ***************************
             TENANT_ID: 1
                JOB_ID: 1
           INCARNATION: 1
         BACKUP_SET_ID: 0
   INITIATOR_TENANT_ID: 1
      INITIATOR_JOB_ID: 1
    EXECUTOR_TENANT_ID: 1002
       PLUS_ARCHIVELOG: OFF
           BACKUP_TYPE: D
             JOB_LEVEL: CLUSTER
       ENCRYPTION_MODE: NONE
                PASSWD:
       START_TIMESTAMP: 2022-06-01 16:54:25.940040
         END_TIMESTAMP: 2022-06-01 16:56:03.779662
                STATUS: COMPLETED
                RESULT: 0
               COMMENT:
           DESCRIPTION:
                  PATH:
   *************************** 2. row ***************************
             TENANT_ID: 1002
                JOB_ID: 1
           INCARNATION: 1
         BACKUP_SET_ID: 1
   INITIATOR_TENANT_ID: 1
      INITIATOR_JOB_ID: 1
    EXECUTOR_TENANT_ID: 1002
       PLUS_ARCHIVELOG: OFF
           BACKUP_TYPE: D
             JOB_LEVEL: USER_TENANT
       ENCRYPTION_MODE: NONE
                PASSWD:
       START_TIMESTAMP: 2022-06-01 16:54:26.007298
         END_TIMESTAMP: 2022-06-01 16:56:03.629399
                STATUS: COMPLETED
                RESULT: 0
               COMMENT:
           DESCRIPTION:
                  PATH: file:///data/nfs/backup/data
   
   obclient> SELECT * FROM oceanbase.CDB_OB_BACKUP_TASK_HISTORY\G
   *************************** 1. row ***************************
                  TENANT_ID: 1002
                    TASK_ID: 1
                     JOB_ID: 1
                INCARNATION: 1
              BACKUP_SET_ID: 1
            START_TIMESTAMP: 2022-06-01 16:54:26.007298
              END_TIMESTAMP: 2022-06-01 16:56:03.576909
                     STATUS: COMPLETED
                  START_SCN: 1658739252505427433
                    END_SCN: 1658739352813474497
          USER_LS_START_SCN: 1658739274182399688
            ENCRYPTION_MODE: NONE
                     PASSWD:
                INPUT_BYTES: 567650229
               OUTPUT_BYTES: 567650229
          OUTPUT_RATE_BYTES: 5817899.8889
            EXTRA_META_BYTES: 0
               TABLET_COUNT: 1285
        FINISH_TABLET_COUNT: 1285
          MACRO_BLOCK_COUNT: 270
   FINISH_MACRO_BLOCK_COUNT: 270
                 FILE_COUNT: 0
               META_TURN_ID: 1
               DATA_TURN_ID: 1
                     RESULT: 0
                    COMMENT:
                       PATH: file:///data/nfs/backup/data
   

   oceanbase.CDB_OB_BACKUP_JOB_HISTORY 视图中的各字段基本与 oceanbase.CDB_OB_BACKUP_JOBS 视图相对应， oceanbase.CDB_OB_BACKUP_TASK_HISTORY 各字段基本与 oceanbase.CDB_OB_BACKUP_TASKS 相对应。其中， COMMENT 用于记录任务失败时的相关错误信息。

   更多 CDB_OB_BACKUP_JOB_HISTORY 和 CDB_OB_BACKUP_TASK_HISTORY 视图的说明，请参见 CDB_OB_BACKUP_JOB_HISTORY 和 CDB_OB_BACKUP_TASK_HISTORY。